The Hidden Security Risks of Vibe Coding Your MVP

AI-powered coding tools like Cursor, Bolt, and Lovable are transforming how founders build their MVPs. You describe what you want, the AI writes the code, and within hours you’ve got something that looks production-ready.

But “looks production-ready” and “is production-ready” are two very different things.

The Allure of Speed

Vibe coding is genuinely impressive. You can go from idea to working prototype in a single afternoon. For non-technical founders especially, this feels like a superpower. And in many ways, it is — for prototyping and validation.

The problem starts when that prototype becomes the product.

Common Security Gaps We’ve Found

After auditing dozens of vibe-coded MVPs, these are the patterns we see repeatedly:

1. Exposed API Keys and Secrets

This is the most common issue by far. AI tools often hardcode API keys directly into client-side code:

// This is what we find in vibe-coded apps
const supabase = createClient(
  'https://your-project.supabase.co',
  'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.your-actual-key-here'
);

That key is now visible to anyone who opens their browser’s developer tools. A better approach:

// Use environment variables — never expose keys client-side
const supabase = createClient(
  import.meta.env.PUBLIC_SUPABASE_URL,
  import.meta.env.PUBLIC_SUPABASE_ANON_KEY
);

2. Missing Row-Level Security

Supabase makes it easy to set up a database, but AI tools rarely configure Row-Level Security (RLS) properly. We’ve seen apps where any authenticated user could read or modify any other user’s data.

-- What we often find: no RLS at all
-- What you need:
ALTER TABLE user_profiles ENABLE ROW LEVEL SECURITY;

CREATE POLICY "Users can only view their own profile"
ON user_profiles FOR SELECT
USING (auth.uid() = user_id);

3. No Input Validation

AI-generated forms almost never validate input on the server side. Client-side validation is a suggestion, not a security boundary.

// Bad: only client-side validation
function handleSubmit(data: FormData) {
  const email = data.get('email') as string;
  // Trust the client? Never.
  await db.insert({ email });
}

// Good: validate on the server
function handleSubmit(data: FormData) {
  const email = z.string().email().parse(data.get('email'));
  const sanitised = DOMPurify.sanitize(email);
  await db.insert({ email: sanitised });
}

What You Should Do

If you’ve vibe-coded your MVP, here’s the minimum security checklist:

1. Audit your environment variables — search your codebase for any hardcoded keys
2. Enable RLS on every table — if you’re using Supabase, this is non-negotiable
3. Add server-side validation — never trust data from the client
4. Set up proper authentication — don’t roll your own auth
5. Get a professional audit — seriously, it’ll save you pain later

The cost of fixing security issues after launch is 10x higher than building them right from the start.

We Can Help

At Further Forward, we offer dedicated Vibe Code Audits where we review your AI-generated codebase and flag every security risk, performance issue, and architectural concern. It’s a fast, affordable way to turn your prototype into something you can actually ship with confidence.